Lamp-socket.



R. B. BENJAMIN. LAMP SOCKET. APPLICATION FILED MAR. 16, 1907.

1502?,916. Patented A r. 23,1912.

V adapted to receive an incandescent electric 1'5" iso UNITED sTA'r gmam racrtmme COMPANY, or CHICAGO,

rumors, A coarcnarron OYFIIILQLINOISV LAMP-SOCKET.

To all wkomz't may concern Be it known thatI, REUBEN B. BENJA- MIN, a citizen of the United States, residing at Chicago, inthe county of Cook and State of Illinois, have invented new and useful Improvements in Lamp-Sockets, of which the following is a full,clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention relates. to improvements in electric lamp sockets, the object of the invention being the provision of a socket lamp and to hold the same with its axis disposed at an angle to the support to which the socket is attached.

Another( object of the invention. is to provide a socket in which the supporting part is secured directly-to the body of the casing,- instead of 'to the removable cap or cover, as heretofore. When the cap is provided with a threaded bushing by means of which the socket is secured to the conduit, as is common in earlier constructions, great difiiculty is experienced in providing means for lock- .ing the body of the shell and the cap toether with suflicient strength to prevent die body of 'the'socket from being accidentally detached from the cap or workingloose when subjected to vibration. The act of screwing a lamp into the socket or removing the same therefrom, with most of the earlier constructions, was liable to cause the separation of the body of the socket from the cap. By attaching the bushing directly to the body portion of the inclosing shell of the socket, I- am enabled to provide a s0cket in which no strain is brought to bear on the parts which would tend to cause the separation of the lamp-carrying part of the socket from its'support.

As is well known, an incandescent electric lamp does not distribute its 1 light equally in all directions. A much greater amount of light is projected from the lamp in a direction transverse the longitudinal axis of the lamp than in the direction of this axis. Hence, it often becomes desirable to Specification of Letters Patent.

' Application filed March 16,

attach the, lamp receptacle to a support such Patented Apr. as, 1912.

1907. Serial No. 362,743.

View of-a lamp-receiving device embodying my invention, the section being taken on the line 1'1 of Fig. 3, looking in the direction indicated by the arrows; Fig. 2 is a front elevational view of the same, looking into the lamp-receiving socket of the device; Fig. 8 is an elevational View of the rear side of the device with the "cover 'or cap removed therefrom and showing the means for connecting the leading-in wires; Fig. 4 shows the device in side elevation with the parts of. the outer casing'or housing separated from each other, illustrating the method by which they are adapted to be secured together; andFig. 5 is a brokensectional view of a slightly modified form of the device adapted to permit conductors to be-led out through, the casing to a portable lamp or switc In the several figures of the drawings, in which like reference numerals indicate the same parts throughout, 6 is a base, formed of porcelain or similar insulating material, which carries the lamp-receiving socket and associatedcontacts, as well,as the, terminals for connection with the supply wires. On one side of this base is secured the la p-receiving shell 7, this shell being held in place by screws 8 and 9 which extend through the base 6. The back of the base dis formed with a squaredepression 10 'and a'circular depression .11. In the square depressionlO is located a nut 12 into which the bolt 8 is screwed. In the depression- 11 is located a plate 13 into which the bolt 9 is screwed.

This plate 13 .is provided with a bindingscrew 14: for'the reception'of one of the 100.

leading-in wires, connection being thus made between the wire and the socket 7 through this screw 14, plate 13 and'bolt 9. The edge of the base 6 is formed with a notch 15, the rear face of the base 6 being formed with a channel 16 leading from this notch 15 to the depression 11. In this channel is laid the leading-in wire which is secured to the binding screw 14. The rear face of the'base 6 has also another circulardepression 17, from which leads a channel 18 opening into the notch 15. A plate 19,

rovided with a binding screw .20, lies in t e recess or depression 17 and conducts current to the end of a bolt 21, this bolt extending centrally :through the base 6 and forming the center cont-act of'the lamp-receiving socket 7, a washer 22 being disposed under the head of the bolt 21, as usual. This washer 22 and the head of the screw 21 are made to project from the base 6 by the annular projection 23 which is formed on this face of the base.

Surrounding and inclosing the base 6 is a casing or shell 24 in the form of a cylindrical sleeve having one of its ends expanded to receive the base 6 and the rest of its body of slightly smaller diameter and inclosing the lamp-receiving socket 7. A sleeve 24", of fiber or the like, insulates the socket from the casing. The shell 24 has, as an inseparable part thereof, either by being permanently attached thereto or formed integral therewith, an attaching device or supporting part for attaching the socketto a suitable fixture. In the present instance, this attaching device consists of a neck 25 which is permanently secured to the shell 24 oppo site the notch 15 in the base. The supply wires are led in through this neck 25, the latter being interiorly screw-threaded so that it may be screwed onto the threaded end of a pipe'or other support such as the arm of a wall fixture or electrolier. 26 is a set screw adapted, when screwed in, to secure the device in place on such arm bypreventing the rotation of the device and the consequent unscrewing of the same.

'The rear side of the base 6 is inclosed by a cap or cover 27 which in the particular form of device illustrated is adapted to be telescoped on over the shell 24, means being provided whereby,'y after this cover 27 is telescoped into place, it may be secured to the shell 24 by giving to the same a simple twist or partial revolution, Such means consist of projections 28, 28*struckup by a punching process from the body of the shell 24, and corresponding depressions 29, 29 in the cover 27 into which these projections extend when the parts of the housing are put together. To facilitate the putting on and removal of the cover 27, a channel or groove 30 is formed in the cap or cover 27, this groove 30 leading from the'edge of the cover inwardly as fan as the de ression 29, but not opening directly theremto. When-the cover has been thrust onto the casing 24 as far as possible and is then given a slight turn, the projection 28 will move out of the groove 30 into the depression 29,. snapping into place and remaining in position therein. To remove the cover 27, considerable force must be applied to rotate the cover 27 back wardly and thus cause the projection 28to enter the groove 30,, consequently it is impossible for the cover to become accidentally detached. This form of connection constitutes a sort of bayonet joint, but is superior to the ordinary bayonet joint, in that it is provided with means for locking the rotatable part of the casing against rotation andconsequent detachment of this part from the main body of the casing. Between the cover 27, and the back of the base 6 is placed an insulating disk 27. It will be observed that the terminals of the contacts on the base are so located as to be accessible through the opening of the shell 24 which is normally closed by the cap or cover 27. lNith this arrangement and by merely removing the cap 'or cover 27 access may be readily had to the binding screws of the terminals to tighten the same or to attach or detach the leading-in wires, or to make repairs or adjustments, without disassembling the socket-or detaching the same from the electrolier or other fixture by which it is supported in use. To prevent the base 6.

from becoming turned in the casing 24, 1 form the edge of the base with a pair of notches 31, 31 and indent in the material of the shell 24 a pair of inwardly-extending projections 32, 32 adapted to enter the notches 31, 31 in the bases In the form of the device shown in Fig.

5,.the cover 27 is provided with a central opening in which is inserted an insulating bushing 33. When it is desired to carrylofi' from the device a pair of conductors leading to a portable lamp, fan-motor, or the like, these conductors may enter through the opening 34 in the bushing 33, and will be secured to the binding-screws 14 and 20..

Obviously, by making the proper connections, these conductors may extend to a switch in series with the lamp, so that the lamp may be lighted or extinguished, from a distance.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

The combination of a flattened base hav ing a socket on one of its sides and recesses Y connections extending through. the base from said contacts to said binding-screws, a

housing for said base and socket, and means scribed' my name in the presence of two 'on said housing for making1 comection w'ith witnesses. a support or conduit for ea ing-in wires, said basehaving a notch adjacent said last- REUBEN BENJAMIN 5 named means and channels extending from Witnesses:

said notch into said recesses. M. L. FARRAR,

In witness whereof, I have hereunto sub- G. L. HOPKINS. 

